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IS 10951 (2002) : Polypropylene Materials for Moulding and 
Extrusion [PCD 12: Plastics] 




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IS 10951 :2002 

Indian Standard 

POLYPROPYLENE MATERIALS 
FOR MOULDING AND EXTRUSION 

(First Revision ) 



ICS 83.080.20 



© BIS 2002 

BUREAU OF INDIAN STANDARDS 

MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG 
NEW DELHI 110002 



February 2002 Price Group 7 



Plastics Sectional Committee, PCD 12 



FOREWORD 

This Indian Standard (First Revision) was adopted by the Bureau of Indian Standards, after the draft finalized 
by the Plastics Sectional Committee had been approved by the Petroleum, Coal and Related Products Division 
Council. 

Polypropylene (PP) is another member of the polyolefin family, since its monomer, propylene, is an unsaturated 
hydrocarbon and belongs to a class of chemical compounds called olefins. Because the monomers of polypropylene 
and polyethylene (ethylene) are so similar, the polymers have many of the similar properties. However, there are 
several major differences, including density (polypropylene' s is lower), service temperature (polypropylene' s is 
higher), rigidity (polypropylene is more rigid), resistance to environmental stress cracking (polypropylene's 
resistance is higher), and susceptability to oxidation (polypropylene is worse than polyethylene). Polypropylene 
is characterized by good mechanical properties, excellent chemical and thermal as well as electrical properties 
and aesthetic appeal in applications such as clear films. Its lower cost per unit weight and high yield on a 
volume basis, due to the low density, offers considerable economic advantage to the converter and end-user. 

Polypropylene may be processed by extrusion, injection moulding, and blow moulding. It may be fiirther processed 
by compression moulding and thermoforming. 

This standard was first published in 1984 with the title 'Specification for polypropylene and propylene — 
Copolymer thermoplastics — Designation'. In this first revision the following changes have been made: 

a) The title and scope have been modified. 

b) The designation system has been thoroughly revised to align the same as far as possible with the 
corresponding ISO standard. The types are differentiated fi-om each other by a classification system 
based on the appropriate levels of designatory properties such as flexural modulus izod impact strength, 
melt flow rate (MFR) and informafion about intended application, method of processing important 
characteristics, additives, colour, fillers and reinforcing materials. 

c) The basic concept of type (product approval) and acceptance (product identification) tests have been 
introduced to make this standard more meaningful. On the basis of type test the product identification 
criteria is derived and fixed and the values obtained for various acceptance tests become the controlling 
specifications. 

This revision does not provide engineering and performance data which may be required to specify a material 
for a particular application or method of processing. 

Considerable assistance has been derived fi-om ISO 1873-1 : 1995 'Plastics — Polypropylene (PP) moulding 
and extrusion materials — Part 1 Designation system and basis for specifications' and ISO 1873-2 : 1997 
'Plastics — Polypropylene (PP) moulding and extrusion materials — Part 2 Preparation of test specimens and 
determination of properties' issued by the International Organization for Standardization (ISO) while preparing 
this revised version of the standard. 

For the typical additional properties specified in 6.3.2 of this standard, the purchaser should establish his own 
correlation between the properties of the processed articles and the material properties required for their 
achievement. 

The composition of the Committee responsible for formulation of this standard is given in Annex C. 

For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, 
observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with 
IS 2 : 1960 'Rules for rounding off numerical values (revised)'. The number of significant places retained in 
the rounded off value should be the same as that of the specified value in this standard. 



IS 10951 : 2002 



Indian Standard 

POLYPROPYLENE MATERIALS 
FOR MOULDESTG AND EXTRUSION 

(First Revision ) 



1 SCOPE 



1.1 This standard prescribes the designation system, 
requirements, methods of sampling and tests for 
polypropylene (PP) thermoplastics material. It applies 
to the material ready for normal use in the form of 
powder, granules or pellets and to materials 
unmodified or modified by colorants, additives, fillers, 
etc. 

1.2 This standard is applicable to all propylene 
homopolymers and to copolymers of propylene with a 
content of other 1 -olefins of less than 50 percent (m/m), 
as well as blends of polymers containing at least 
50 percent (m/m) of aforementioned polymers. 

1.3 It is not intended to imply that materials having 
the same designation give necessarily the same 
performance. This standard does not provide 
engineering data, performance data or data on 
processing conditions which may be required to specify 
a material for a particular application and/or method 
of processing. 

If such additional properties are required, they shall 
be determined in accordance with the test methods 
specified in 6.3.2 if suitable. 

1.4 This standard does not apply to propylene-based 
rubber. 

1.5 This standard does not cover masterbatches. 

2 REFERENCES 

The Indian standards listed in Annex A contain 
provisions which, through reference in this text, 
constitute provisions of the standard. At the time of 
publication, the editions indicated were valid. All 
standards are subject to revision, and parties to 
agreements based on this standard are encouraged to 
investigate the possibility of applying the most recent 
editions of the standards listed in Annex A. 

3 DESIGNATION 

3.1 The designation system given in 3.2 into which 
the materials are classified according to method of 
processing, their designatory properties such as 
flexural modulus, izod impact strength and melt flow 
rate and certain other supplementary information shall 
be used. The designation system is only intended to 



indicate a broad classification and in most 
circumstances specific values of the designatory 
properties and other characteristics as given in 6 shall 
be required. 

3.2 The designation shall consist of following 
information given in the order presented and shall be 
codified in different blocks as indicated below: 

Block 1 For Indian Standard 

Block 2 Identification of the plastic by its 

symbol (PP) and information about 
the composition of the polymer 
(see 3.3) 

Blocks Position 1 intended application or 

method of processing (see 3,4). 
Positions 2 to 8: Important 
characteristics, additives and 
supplementary information (see 3.4) 

Block 4 Designatory properties (see 3.5) 

Block 5 Fillers or reinforcing materials and 

their nominal content (see 3.6) 

Block 6 For the purpose of specifications, an 

optional sixth block may be added 
containing additional information 

The first character of the individual block shall be a 

hyphen. The blocks shall be separated from each other 

by comma (,). 

If a block is not used, this shall be indicated by 
doubling the separation sign, that is by two 
commas {„). 

3.2.1 For Block 1 the number and year of this Indian 
standard shall be indicated. 

3.3 Block 2 

In this block, after the hyph^, polypropylene plastics 
are identified by the symbol "PP", followed by a 
hyphen and a single code giving additional 
information on the polymer as specified in Table 1 . 

3.4 Block 3 

In this block, information about intended application 
and/or method of processing is given in position 1 
and information about important characteristics, 
additives and colourants in positions 2 to 8. The code 
to be used are specified in Table 2. 

If information is presented in positions 2 to 8 and no 



1 



IS 10951 :2002 



specific information is given in position 1, the letter 
X shall be inserted in position I. 

Table 1 Code Used for Additional 
Information in Block 2 

(Clause 3.3) 

Code Definition 

(1) (2) 

H Propylene homopotymer 

R Thermoplastic propylene random copolymer 

containing another olefmic monomer (or monomers) 
having no functional group other than the olefmic 
group, copolymerized with propylene 

B '> Tliemioplastic propylene impact copolymer consisting 

of two or more phases of either a propylene plastic H 
or a propylene plastic R and rubber phases composed 
of propylene and another olefmic monomer (or 
monomers) having no ilinctional group other than the 
olefmic group, added in-silu or physically blended with 
the propylene plastic matrix. 

'^ This group of polymers were termed 'block' copolymers in the past. 

Table 2 Code Used in Block 3 

(Clause 3.4) 



Code(Position 1) 

(1) 



Code (Positions 2-8) 

(2) 







A 


Processing stabilized 


B 


Blow moulding 


B 


Antiblocking 


C 


Calendering 


C 


Coloured 






D 


Powder 


E 


Extrusion 


E 


Expandable 


F 


Extrusion of films 


F 


Special burning 
characteristics 


G 


Genera! use 


G 


Granules 


H 


Extrusion coating 


H 


Heat-ageing stabilized 


K 


Cable and wire coating 


K 


Metal deactivated 


L 


Monofilament extrusion 


L 


Light or weather 
stabilized 


M 


Injection moulding 


M 


Nucleated 






N 


Natural (no colour added) 


P 


Pipe and tube extrusion 


P 


Impact modified 





Compression moulding 






R 


Rotational moulding 


R 


Mould release agent 


S 


Sintering 


S 


Slip agent 


T 


Tape manufacture 


T 


Transparent 


X 


No indication 






Y 


Textile yams, spinning 


Y 


Increase electrical 
conductivity 






Z 


Antistatic 


3.5 Block 4 







in this block, the range of flexural modulus is 
represented by a 2-digit code (see 3.5.1), the range of 
impact strength by a 2-digit code (see 3.5.2) and the 
range of melt flow rate by a 3-digit code {see 3.5.3). 
The codes are separated from each other by hyphens. 



If a property value falls on or near a range limit, the 
manufacturer shall state which range will designate 
the material. If subsequent individual test values lie 
on, or on either side of the cell limit, because of 
manufacturing tolerances, the designation is not 
affected. 

3.5.1 Flexural Modulus 

The flexural modulus shall be determined in 
accordance with IS 13360 (Part 5/Sec 7)/ISO 78. 

The possible values of flexural modulus are divided 
into six ranges, each represented by a 2-digit code as 
specified in Table 3. 

Table 3 Ranges of Flexural Modulus in Block 4 

(Clause 3.5 A) 



Code 

(«) 
02 
06 
10 
16 
28 
40 



Range of Flexural Modulus (MPa) 

(2) 

<400 

> 400 but S 800 

> 800 but s 1200 

> 1200 but s 2000 

> 2000 but ^3500 

> 3500 



3.5.2 Izod Impact Strength 

The notched izod impact strength shall be determined 
in accordance with IS 13360 (Part 5/Sec 4)/IS0 180. 

The possible values of notched izod impact strength 
are divided into six ranges, each represented by a 
2-digit code as specified in Table 4. 

Table 4 Ranges of Izod Impact 
Strength in Block 4 

(Clause 3.5.2) 



Code 

(1) 

02 
05 
09 
16 

25 
35 



Izod Impact Strength 

kJ/m^ 

(2) 

<3 

> 3 but < 6 

> 6 but < 12 

> 12 but < 20 

> 20 but < 30 

>30 



3.5.3 Melt Mass Flow-Rate (MFR) 

The melt flow-rate (mass) shall be determined in 
accordance with IS 13360 (Part 4/Sec l)/iSO 1 133 at 
230°C with a load of 2.16 kg. The possible values of 
melt flow rate are divided into eleven ranges, each 
represented by a 3-digit code as specified in Table 5. 



IS 10951 : 2002 



Table 5 


Range 


of Melt Mass Flow 


Table 6 Code for Fillers and 


Reinforcing 




Rate (MFR) in Block 4 




Materials in Block 5 






(Clause 3.5.3) 




{Clause 3.6) 




Code 






MFR(g/IOmin) 


Code 


Material Code 


Form 


(!) 






(2) 


(1) 


(2) (3) 


(4) 


000 






<0.I0 


B 


Boron B 


Beads, spheres, balls 


001 






> 0. 10 but < 0.20 


C 


Carbon D 


Powder 


003 






> 0.20 but < 0.40 




F 


Fibre 


006 






> 0.40 but < 0.80 


G 


Glass G 


Ground 


012 






> 0.80 but < 1.5 




H 


Whiskers 


022 






>1.5but<3.0 


K 


Calcium carbonate 




045 






> 3.0 but < 6.0 


L 


''Cellulose 




090 






> 6.0 but < 12.0 


M 


'^Mineral, ''metal. 




200 






> 12.0 but < 25.0 




^'Mineral fillers 




400 






> 25.0 but < 50.0 


S 


Synthetic, "organic 




700 






>50.0 


T 
W 


Talc 
Wood 














3.6 Block 5 








X 
Z 


Not specified X 
Others" Z 


Not specified 
Others" 



In this block, the type of filler and/or reinforcing 
material is represented by a single code in position 1 
and its physical form by a second code in position 2, 
the codes being as specified in Table 6. Subsequently 
(without a space), the mass content may be given by a 
2-digit number in positions 3 and 4. 

3.7 Block 6 

Indication of additional requirements in this optional 
block is a way of transforming the designation of a 
material into a specification for a particular 
application. This may be done for example by reference 
to a suitable published Indian standard. 

3.8 Coding Examples 



" These materials may be further defined by their chemical symbol. 
In the case of metals (M), it is essential to indicate the type of metal 
by means of its chemical symbol . 

^' Mineral fillers shall be designated more precisely if a symbol is 
available. 

Mixtures of materials and/or forms may be indicated by combining 
the relevant codes using the sign "+" and placing the whole between 
parentheses. For example, a mixture of 25 percent glass fibre (OF) 
and 10 percent mineral powder (MD) would be indicated by 
(GF25 + MD10). 

3.8.1 A polypropylene homopolymer (PP-H) intended 
for film extrusion (F), with antioxidants (processing 
stabilized) (A) natural (not coloured) (N), having a 
tlexural modulus of 1 660 MPa (16), an impact 
strength of 4 kJ/m- (05) and a melt flow rate of 2.9 
g/10 min (022), shall be designated as: 



IS 10951 

Block 1 

(Indian Standard) 



PP-H 



J 



Block 2 

(Identification of the plastics) 
Symbol 



Homopolymer 



Block 3 

(Intended application or processing, 
additives and supplementary information) 
For film extrusion 



Processing stabilized, natural (not coloured) 



Block 4 

(Designatory properties) 
Flexural modulus - 
Impact strength — 
Melt flow rate 



F-A-N 
I 



16-05-022 
I 



Designation ; -IS 10951 : 2001, -PP-H, -F-A-N, -16-05—022 



IS 10951 : 2002 



3.8.2 A thermoplastic propylene impact copolymer 
(PP-B) for extrusion of sheets (E), with antioxidants 
(processing stabilised) (A) having flexural modulus 



IS 10951 

I 
Block 1 I 

(Indian Standard) • 

Block 2 

(Identification of the plastics) 
Symbol 



PP-B 



of 1 200 MPa (10), an impact strength of 22.5 kJ/m^ 
(25) and a melt flow rate of 1 .5 g/1 min (012), without 
special modification but coloured (C), would be 
designated as: 

E-A-C 10-25-012 



impact copolymer 



Block 3 

(Intended application or processing, 
additives and supplementary information) 
For extrusion of sheet 



Processing stabilized, and coloured 



Block 4 

(Disignatory properties) 
Flexurat modulus - 
Impact strength — 
Melt flow rate 



Designation : -IS 10951 : 2001, -PP-B, -E-A-C, -10-25-012 



3,8.3 A polypropylene homopolymer (PP-H) intended 
for injection moulding (M), having a flexural modulus 
of 4 500 MPa (40), an impact strength of 2 kj/m^ (02) 



and a melt flow rate of 3.5 g/10 min (045), reinforced 
with 40 percent talc powder (TD 40) shall be 
designated as follows: 



IS 10951 

Block 1 

(Indian Standard) 



PP-H 



M 



40-02-045 



T-D-40 



J 



Block 2 

(Identification of the plastics) 
Symbol 



Homopolymer 



Block 3 

(Intended application or processing, 
additives and supplementary information) 
For injection moulding __^^_— __ 



Block 4 

(Designatory properties) 
Flexural modulus — 
Impact strength — 
Melt flow rate 



Block 5 

(Fillers or reinforcing materials 

and their nominal content 

Talc 



Powder — .^^— — 
Mass content, percent 



Designation : -IS 10951 : 2001, -PP-H, -M, ^0-02-045, -T-CMO 



IS 10951 : 2002 



3.8.4 Coding Example (Designation Transformed into 
a Specification) 

A polypropylene homopolymer (PP-H) intended for 
tape manufacture (T), which is light stabilized (L), 

IS 10951 PP-H T-L 



Block 1 I 

(Indian Standard) . 



having a flexural modulus of 1 650 MPa (16), an 
impact strength of 4.0 kJ/m^ (05), a melt flow rate of 
3.0 g/10 min (022) and meeting the requirement of 
IS 1 11 97, shall be designated as given below: 



16-05-022 



IS 11197:1985 



Block 2 

(Identification of the plastics) 
Symbol 



Homopolymer 



Block 3 

(Intended application or processing, 
additives and supplementary information) 

For tape manufacture 

Light stabilized 



Block 4 

(Designatory properties) 
Flexural modulus — 
Impact strength — 
Melt flow rate — — 



Block 5 

(Fillers or reinforcing materials 
and their nominal content 

Not used 



Block 6 

(Additional information) 

Meeting the requirements of 
other published Indian standard 



Designation : -IS 10951 : 2001, -PP-H, -T-L, -16-05-022, , IS 1 11 97 : 1985 



4 PREPARATION OF TEST SPECIMEN 

It is essential that specimens are always prepared by 
the same procedure (either injection moulding or 
compression moulding), using the same processing 
conditions. 

The procedure to be used for each test method is 
indicated in Table 9. 

4.1 Treatment of the Material before Moulding 

Before processing, no pretreatment of the material 
sample is normally necessary. 

4.2 Injection Moulding 

Injection moulded specimens shall be prepared in 
accordance with IS 13360 (Part 2/Sec 3)/IS0 294-1 
or IS 13360 (Part 2/Sec 7)/IS0 294-3 using the 
conditions specified in Table 7. 



4.3 Compression Moulding 

Compression moulded sheets shall be prepared in 
accordance with IS 13360 (Part 2/Sec 1) using the 
conditions specified in Table 8. 

The test specimens required for the determination of 
the properties shall be machined from the 
compression-moulded sheets in accordance with 
IS 13360 (Part 2/Sec 4)/ISO 2818 or stamped using 
appropriate punch. 

A frame mould may be used, but it is necessary to 
start cooling whilst simultaneously applying the full 
pressure. This avoids the melt being pressed out of 
the frame and avoids sink marks. 

For thicker sheet (4 mm approx), a positive mould 
has been found to work satisfactorily. The preheating 
time depends on the type of mould and the type of 
energy input (steam, electricity). For frame mould, 5 



IS 10951 : 2002 



min is usually sufficient but for positive mould, due 
to the bigger mass, a preheating time of up to 15 min 
is necessary, especially if electric heating is used. 

Table 7 Conditions for Injection 
Moulding of Test Specimens 

{Clmise 4.2) 

Material Melt Mould Average Hold Total 

TeinpcratureTempcrature Injection Pressure Cycle 

Velocity Time Time 

"C "C mm/s s s 

(1) (2) (3) (4) (5) (6) 



MFR<I.5 


255 


40 


200 + 20 


40 


60 


g/lOmin 












1.5<MFR 


230 


40 


200 + 20 


40 


60 


<7g/IOinin 












MFR>7 


200 


40 


200 + 20 


40 


60 


s/ 10 min 













NOTE — Heat sensitive polypropylenes may undergo molecular 
breakdown during moulding: therefore an increase in the melt flow 
rate to >1 .5 times the original value shall be avoided with such 
materials. If the MFR increases by more than 1 .5 times the original 
value, the melt temperature shall be lowered, 10"C at a time, until 
the increase in MFR is <1.5 times the original value. This 
adjustment in melt temperature shall be reported. The uniformity 
of the mouldings shall be checked by weighing. Their masses shall 
not ditTer by more than 1 percent from each other. 

5 CONDITIONING 

Test specimens shall be conditioned in standard 
atmospheric condition of 27 ± 2°C and 65 ± 5 percent 
relative humidity in accordance with IS 13360 (Part 1) 
before performing the required tests. 

Test shall be conducted in the standard atmospheric 
condition of 27 ± 2°C and 65 ± 5 percent relative 
humidity. 

6 REQUIREMENTS 

6.1 The material shall be uniform and free from foreign 
matter. 

6.2 Property Requirements 
6.2.1 Minimum Requirements 

The minimum properties required to be measured for 



polypropylene materials are flexural modulus, izod 
impact strength and melt mass flow rate. 

6.2.1.1 Flexural modulus 

The flexural modulus of the material shall be as agreed 
to between the purchaser and the supplier and shall 
be determined by the method prescribed in IS 13360 
(Part 5/Sec 7)/lS0 1 78. The value of flexural modulus 
shall be within ± 20 percent of the specified flexural 
modulus, if this is 1 200 MPa or above and shall be 
within ± 30 percent of the specified flexural modulus, 
if this is less than 1 200 MPa. 

6.2.1.2 Izod impact strength 

The izod impact strength of the material shall be as 
agreed to between the purchaser and the supplier and 
shall be determined by the method prescribed in 
IS 13360 (Part 5/Sec 4)/ISO 180. The value of izod 
impact strength shall be within ± 20 percent of the 
specified flexural modulus, if this is 12 kJ/m^ or above 
and shall be within ± 30 percent of the specified izod 
impact strength, if this is less than 12 kJ/m^. 

6.2.1.3 Melt mass-flow rate (MFR) 

The melt mass-flow rate of the material shall be as 
agreed to between the purchaser and the supplier and 
shall be determined by the method prescribed in 
IS 13360 (Part 4/Sec 1)/IS0 1 133. The value of melt 
flow rate shall be within ± 20 percent of the specified 
melt flow rate, if this is 1 g/10 min or above and shall 
be within ± 30 percent of the specified melt flow rate, 
if this is less than 1 g/10 min. 

6.3 Additional Requirements 

6.3.1 Other properties to be selected shall be 
determined by the characteristics required for 
processing and the characteristics required of the 
processed article. 

NOTE — The purchaser should establish his own correlation 
between the properties of the processed article and the material 
properties required for their achievement. 

6.3.2 Typical Additional Properties 

The typical additional properties to be measured along 
with its corresponding test methods are given in 
Table 9. 



Table 8 Conditions for Compression Moulding of Test Specimens 

{Clause 4.3) 



Material Moulding Average Demoulding 

Temperature Cooling Rate Temperature 

"C "C/min "C 

{!) (2) (3) (4) 

All grades 2i0 15 <40 



Full Full Pre-heating Pre-heating 

Pressure Pressure Time Pressure 

MPa min MPa min 

(5) (6) (7) (8) 

5/)0* 5±1 Contact 5 to 15 



♦Use 5 MPa for frame mould and 1 MPa for positive mould. 



IS 10951 : 2002 



Table 9 Typical Additional Properties and Corresponding Test Methods 

{Clause 6.3.2) 

Method of Test, Ref to 

(3) 

iS 1 3360 (Part 5/Secl)/ ISO 527-1 

and 

IS 13360 (Part S/Sec 2) / ISO 527-2 

IS 13360 (Part 5/Sec 5) /ISO 179 

IS13360(Part5/Secl3) 

IS 13360 (Part 5/Secll) 

IS13360(Part6/SeclO) 

IS 13360 (Part 6/Sec 3) /ISO 75-1 

IS 1 3360 (Part 6/Sec 1 7) / ISO 75-2 
IS 13360 (Part 6/Sec 1) / ISO 306 
IS 13360 (Part 6/Sec 4) /ISO 1210 
IS 13360 (Part 6/Sec 19) /ISO 4589-2 

IS 4486 

IS 1 3360 (Part 7/Sec / ISO 391 5 

IS 2071 (Parti) 



IS 13360 (Part 8/Sec I) / ISO 62 
IS 1 3360 (Part 3/Sec I )/ ISO 1 1 83 



SI 




Property 


No. 






(1) 




(2) 


i) 


Mechanical Properties 




a) 


Tensile yield strength, MPa 




b) 


Elongation at yield, percent 




c) 


Tensile strength at break, MPa 




d) 


Elongation at break, percent 




e) 


Charpy impact strength, kJ/m' 







Hardness — Rockwell, R 
— Shore, D 


ii) 


Thermal Properties 




a) 


Melting temperature,°C 




b) 


Temperature of detlection 
under load, °C 




c) 


Vicat softening temperature, °C 




d) 


Flammabiiity, mm/mim 




e) 


Ignitability (oxygen index), percent 


iii) 


Electrical Properties 




a) 


Relative permittivity 
Dissipation factor 




b) 




c) 


Volume resistivity 1 




d) 


Surface resistivity J 




e) 


Dielectric strength 


iv) 


Other properties 




a) 


Water absorption 




b) 


Density 



6.4 Special Requirements for Foodstuffs, 
Pharmaceuticals and Drinking Water Applications 

All additives used in the material which is meant for 
usage in contact with foodstuffs, pharmaceuticals and 
drinking water shall meet the requirements specified 
in IS 10909. 

When the products are used in contact with foodstuffs, 
pharmaceuticals and drinking water, its requirements 
with respect to the material shall also be met as per 
IS 10910. 

7 TESTS 

7.1 Classification of Tests 

7.1.1 Type Tests (Product Approval) 

The following shall constitute the type tests (product 
approval): 

a) Flexural modulus {see 6.2.1.1); 

b) Izod impact strength {see 6.2.1.2); and 

c) Meh mass-flow rate {see 6.2.1.3). 

7.1.1.1 Polypropylene material shall be subjected to 



product type approval in accordance with details given 
in Annex B. 

7.1.2 Acceptance Tests (Product Identification) 

7.1.2.1 All the tests which the purchaser shall establish 
out of those listed in 6.3.2 by correlating the properties 
of the proposed article and the material properties 
required for their achievement. 

7.1.2.2 The batch shall be accepted if the polypropylene 
material is found to comply with the requirements of 
acceptance (Product identification) tests given 
in 7.1.2.1. 

8 PACKING AND MARKING 

8.1 Packing 

The material shall be delivered in suitable form of 
packing, as agreed to between the purchaser and the 
supplier. 

8.2 Marking 

Each container and package shall be clearly marked 
with the following: 



IS 10951 : 2002 



a) Name and type of the material, 

b) Designation code, 

c) Net mass of the material, 

d) Batch number, 

e) Month and year of manufacture of the mate- 
rial, and 

f) Indication of the source of manufacture and 
trade mark, if any. 

8.3 BIS Certification Marking 

The containers and packages may also be marked with 
the Standard Mark. 

8.3.1 The use of the Standard Mark is governed by 
the provisions of the Bureau of Indian Standards Act, 
1986 and the Rules and Regulations made thereunder. 
The details of conditions under which the licence for 
the use of the Standard Mark may be granted to 
manufacturers may be obtained from the Bureau of 
Indian Standards. 

9 SAIVIPLING 

9.1 General 

in drawing, preparing, storing and handling samples, 
the precautions and directions given in 9.1.1 to 9.1.6 
shall be observed. 

9.1.1 Samples shall not be taken in an exposed place. 

9.1.2 The sampling instrument shall be of stainless 
steel or any other suitable material on which the 
material shall have no action. The instrument shall 
be clean and dry. 

9. 1 .3 Precautions shall be taken to protect the samples, 
the materials being sampled, the sampling instrument 
and the containers for samples from adventitious 
contamination. 

9.1.4 The samples shall be placed in a suitable clean, 
dry, air-tight, sheet metal or glass container on which 
the material has no action. The sample container shall 
be of such a size that it is almost completely filled by 
the sample. 

9.1.5 Each sample container shall be sealed air-tight 
with a stopper after filling and marked with full details 
of sampling such as the date of sampling, the month 
and year of manufacture of the material, etc. 

9.1.6 Samples shall be stored in such a manner that 
the temperature of the material does not vary unduly 
from the normal temperature. 

9.2 Scale of Sampling 
9.2.1 Lot 

In a single consignment, all the containers of the same 



type of the material and drawn from a single batch of 
manufacture shall constitute a lot. If a consignment is 
known to consist of different batches of manufacture 
or of different sizes of containers, the containers 
belonging to the same batch and size shall be grouped 
together and each such group shall constitute a 
separate lot. 

9.2.2 For ascertaining the conformity of the material 
in a lot to the requirements of the specifications, tests 
shall be carried out for each lot separately. The number 
of containers («) to be selected from a lot (N) shall be 
in accordance with Table 1 0. 

Table 10 Number of Containers 
to be Selected for Sampling 



Lot size 


No.ofContai 


ners to be Selected 


A' 




n 


(1) 




(2) 


Up to 3 


Each container 


4 to 15 




3 


I6to50 




4 


51 to 100 




5 


101 to 300 




7 


301 to 500 




10 


501 and above 




15 



9.2.2.1 These containers shall be selected at random 
from the lot. For the purpose, reference may be made 
to IS 4905. 

9.3 Preparation of Test Sample and Referee Sample 

9.3.1 Sampling Instrument 

The sampling instrument made of stainless steel shall 
be as shown in Fig. 1 . It shall be capable of taking 
samples from all points when inserted into the 
container. 

9.3.2 From each of the containers selected, portions of 
the material shall be drawn with the help of the sampling 
instrument. For this purpose, the material shall be taken 
from different points, at least 75 mm away iri the case 
of small containers. The total quantity of the material 
collected from each container shall be sufficient to 
conduct tests for the determination of the various 
characteristics and shall be not less than 1.5 kg. 

9.3.3 Out of these portions, a small but equal quantity 
of the material shall be taken out and mixed thoroughly 
to form a composite test sample. The composite test 
sample thus formed shall be divided into three equal 
parts and transferred to separate bottles which are then 
sealed air-tight and labelled with all the particulars of 
sampling given under 9.1.5. One of these bottles shall 
be marked for the purchaser, one for the supplier and 
third for the referee. 



IS 10951 : 2002 




section xx 

FigI. Sampling Instrument 



9.3.4 The remaining portion of the material from each 
container shall be divided into three equal parts and 
each part shall be transferred to separate bottles which 
are then sealed air-tight with stoppers and labelled 
with all the particulars of sampling given under 9.1.5. 
The material in each such sealed bottle shall constitute 
an individual test sample. These individual test 
samples shall be grouped into three sets in such a way 
that every set has a test sample representing each 
container selected. One of the three sets shall be 
marked for the purchaser, one for the supplier and the 
third for the referee, 

9.3.5 Referee Samples 

Referee sample shall consist of the composite test 
sample and a set of individual test samples marked 
for the purpose and shall bear the seals of the purchaser 
and the supplier. It shall be used in case of dispute 
between the two. 



9.4 Number of Tests 

9.4.1 Tests for the determination of flexural modulus, 
izod impact strength and melt mass-flow rate shall be 
conducted individually on each of the samples in the 
set of individual samples. 

9.4.2 Tests for the determination of the remaining 
characteristics shall be conducted on the composite 
samples. 

9.5 Criteria for Conformity 

a) Each of the test results for flexural modulus, 
izod impact strength and meit mass-flow rate 
satisfies the corresponding requirements 
given in 6.2.1.1, 6.2.1.2 and 6.2.1.3. 

b) The test results on the composite sample for 
the remaining characteristics satisfy the 
corresponding requirements given in 6-3, 6.4 
and 7.1.2.1. 



IS 10951 : 2002 



ANNEX A 

{Clause 2) 

LIST OF REFERRED INDIAN STANDARDS 



IS No. 
2071 
(Part 1) : 1993 

4486: 1967 



4905 : 1968 
10909 :2001 



10910: 1984 



11197: 1985 

13360 

(Part 1): 1992 
(Part2/Sec 1) : 
1992 



(Part 2/Sec 4) 
1999/lSO 
2818: 1994 

(Part 3/Sec 1 ) 
1995/ISO 
1183 : 1987 

(Part4/Sec 1) 
2000/ISO 
1133 : 1997 



(Part 5/Sec 1 ) 
1996/ISO 
527-1 : 1993 
(Part 5/Sec 2) 
1996/1 SO 
527-2 

(Part 5/Sec 4) 
1 996/ISO 
180: 1993 
(Part 5/Sec 5) : 
1996/lSO 
179 : 1993 



Title 
High voltage techniques : Part 1 
General definitions and test require- 
ments 

Recommended methods for the de- 
termination of the permittivity and 
dielectric dissipation factor of elec- 
trical insulating materials at power, 
audio and radio frequencies includ- 
ing metre wavelengths 
Methods for random sampling 
Positive list of polyproplene and its 
copolymers in contact with 
foodstuffs, Pharmaceuticals and 
drinking water {first revision) 
Polypropylene and its copolymers for 
its safe use in contact with foodstuffs, 
pharmaceuticals and drinking water 
Monoaxially oriented polypropylene 
tapes 

Plastics — Methods of testing 
Introduction 

Sampling and preparation of test 
specimens, Sec 1 Compression 
moulded test specimens of thermo- 
plastic materials 

Sampling and Preparation of test 
specimens, Sec 4 Preparation of 
test specimens by machining (first 
revision) 

Physical and dimensional properties, 
Sec 1 Determination of density 
and relative density of non-cellular 
plastics 

Rheological properties. Sec 1 
Determination of the melt mass-flow 
rate (MFR) and the melt volume- 
flow rate (MVR) or thermoplastics 
(first revision) 

Mechanical properties, Sec I 
Determination of tensile properties 
General principles 
Determination of tensile properties 
Test conditions for moulding and 
extrusion 

Mechanical properties. Sec 4 
Determination of izod impact 
strength 

Mechanical properties. Sec 5 
Determination of charpy impact 
streneth 



IS No. 
(Part 5/Sec 7): 
1996/ISO 
178 : 1993 
(Part 5/Sec II) 
1992 



(Part 5/Sec 13) 
1992 

(Part6/Secl) 
1992/ISO 
306 : 1994 

(Part 6/Sec 3) 
1997/ISO 
75-1 : 1993 

(Part 6/Sec 4) 
1997/ISO 
1210: 1992 



(Part 6/Sec 10) 
1992 



(Part7/Sec 1) 
1996/ISO 
3915: 1983 
(Part 6/Sec 17) 
1997/ISO 
75-2 : 1993 

(Part 8/Sec 1) 

1997/ISO 

62 : 1980 

(Part 2/Sec 3) 

2000 
ISO 294-1 ; 

1996 

(Part 2/Sec 7) 

2000/ISO 
294-3 : 

1996 

(Part 6/Sec 19) 

2000/ 
ISO 4589-2 : 

1996 



Title 
Mechanical properties, Sec 7 
Determination of flexural properties 

Mechanical properties. Sec 1 1 
Determination of indentation 
hardness of plastics by means of 
durometer (Shore hardness) 
Mechanical properties. Sec 13 
Determination of Rockwell hardness 
Thermal properties. Sec 1 
Determination of Vicat softening 
temperature of thermoplastics 
materials 

Thermal properties, Sec 3 
Determination of temperature 
deflection under load — General test 
method 

Thermal properties, Sec 4 
Determination of the burning 
behaviour of horizontal and vertical 
specimens in contact with small- 
flame ignition source 
Thermal properties. Sec 10 Deter- 
mination of melting behaviour 
(melting temperature or melting 
range) of semi-crystalline polymers 
Electrical properties, Sec 1 
Measurement of resistivity of 
conductive plastics 
Thermal properties, Sec 17 
Determination of temperature 
deflection under load — Plastics and 
ebonite 

Permanence/Chemical properties, 
Sec 1 Determination of water 
absorption 

Sampling and preparation of test 
specimens Sec 3 Injection 
moulded test specimens of 
thermoplastic materials 
Sampling and preparation of test 
specimens, Sec 7 Small plates 
(first revision) 

Thermal properties, Sec 19 
Flammability by oxygen index 
Elevated temperature test 



10 



IS 10951 : 2002 



ANNEX B 
(Clause 7. 1 A. \) 

PRODUCT TYPE APPROVAL 



Polypropylene (PP) material of a particular designation 
for which the product/type approved is required shall 
be subjected to the tests for flexural modulus, izod 
impact strength and melt flow-rate (MFR). 

PP material of that particular designation successfully 
passing in these product/type approval tests shall be 
for other requirements {Product identification tests) 
as stipulated in 7.1.2.1 which would be recorded and 
these shall be the controlling specifications as long as 
there is no change in the grade designation of the PP 
material, as fixed. 

In the event of any change in the grade/designation of 



the PP material reapproval will be required and the 
type tests shall be carried out afresh and the controlling 
specifications for acceptance test redetermined and 
fixed. 

When the proposed changes are such that it may not 
be expected to significantly affect the performance 
(satisfactorily passing the type tests) the certifying/ 
testing authority may at its discretion recommend 
waiving complete reapproval or may require only 
partial reapproval in order to determine the 
significance and acceptability of the proposed changes 
and to redetermined the controlling specification for 
acceptance tests. 



11 



IS 10951 : 2002 



ANNEX C 

(Foreword) 

COMMITTEE COMPOSITION 

Plastics Sectional Committee, PCD 12 



Organization 
Internet Exchange Next.com Limited, Miimbai 
Amines and Plasticizers Ltd, Mumbai 

Bakelite I lylam Ltd, Hyderabad 

Building Materials and Technology Promotion Council, New Delhi 
Central Institute ofPlastics Engineering and Technology, Chennai 

Central Food Technological Research Institute, Mysore 

Gas Authority of India Ltd, Noida 

GE Plastics India Limited, Gurgaon 

Gharda Chemicals Ltd, Thane 

Gujarat State Fertilizers Company Limited, Vadodara 

Haldia Petrochemicals Ltd, Kolkata 

Hindustan Polymers Ltd, Mumbai 

Indian Centre for Plastics in Environment, Mumbai 
Indian Petrochemicals Corporation Limited, Vadodara 

Indian Institute of Packaging, Mumbai 

Indian Plastics Institute, Mumbai 

Indian Toxicological Research Centre, Lucknow 
Jain Irrigation Systems Ltd, Jalgaon 

Larsi n & loubro Ltd, Mumbai 

Miiii.try of Defence (R&D), Kanpur 

Ministry of Defence, RDSO, Lucknow 

Ministry of Health and Family Welfare, DGHS,New Delhi 

Ministry of Food Processing Industries, New Delhi 
National Chemical Laboratory, Pune 

National Dairy Development Board, Anand 



Representative (s) 
Shri S arup Chowdhary {Chairman) 

ShriV.V.Kulkarni 

Dr R. V. Utekar {Alternate) 

DrC.S.Narasimhan 

Dr M. Balakrishnan {Alternate) 

ShriJ.Sengupta 

DrVuai Kumar 

Dr K. Palanivelu {Alternate) 

Shri S. K. Kumar 

Shri Baldev Raj {Alternate) 

Shri Shivaji Basu 

Shri V. K. Singh {Alternate I) 

Shri Manish Khandelwal {Alternate II) 

General Manager z 

Dr (Shrimati) Rashmi Bhardwaj {Alternate) 

DrB. K. Desai 

Dr U. M. Vakil {Alternate) 

Shri B. D. Adhvaryu 

Dr Y. P. Singh {Alternate) 

Shri Shankar B anerjee 

Shri AMrrAVA Sanyal {Alternate) 

Shri S. V. Parveen 

Shri N. C. Dhocendranath {Alternate) 

DrA.N. Bhat 

ShriJ.B.Kamat 

Shri V. C. Francis {Alternate) 

Shri P. V. Narayanan 

Dr N. G. Mokashi {Alternate) 

Shri D. R. Patel 

Shri R. K. Aggarwal {Alternate) 

DrV.P.Sharma 

Dr H. C. MRLrrHYUNjAYA 

Shri S. B. Joshi {Alternate I) 
Shri A. P. Choudhari {Alternate II) 

Shri V. Mohan 

Shri R. Suba Rao {Alternate) 

ShriM.N.Saraf 

Dr L. D. Khandpal {Alternate) 

Joint Director (Rubber) 

Director (SS) {Alternate) 

Addl Director General (PF A) 
Shri Sundar Lal {Alternate) 

ShriO.P.Gera 

Dr S. S. Mahajan 

Dr S. S. Kulkarni {Alternate) 

Dr R. S. Lathana 

Shri S. K. Khandelwal {Alternate) 



{Continued on page 13) 



12 



IS 10951 : 2002 



{Continued from page 1 2) 

Organization 
National Organic Chemical Industries Ltd, Mumbai 

Niichem Ltd, Faridabad 
Permali Wallace Ltd, Bhopal 

Reliance Industries Ltd, Mumbai 

Saint-Gobain Vetrotex India Ltd, Hyderabad 

Shivalik Agro-Poly Products Ltd, Parwanoo, H.P. 

Shriram Fertilizers & Chemcials, Kota 

Shriram Institute for Industrial Research, Delhi 
Supreme Petrochem Ltd, Mumbai 

Tata Fngg & I ocomotive Co Ltd, Jamshedpur 

The All India Plastics Manufacturers Association, Mumbai 

The Plastics & Linoleums Export Promotion Council, Mumbai 
VIP Industries. Mumbai 

XPRO India Ltd, Faridabad 

BIS Directorate General 



Representative(s) 

Skri V. K. Sharma 

Shri J. K. Vadodaria (Alternate) 

Dr R. M, Mehta 

Shri CCS AKARDA 

Shri S. K. Kodesia (Alternate) 

DrY. B. Vasudeo 

Dr K. S. Jadhav (Alternate) 

Shri S. Sundaram 

Shri S. K. Ghosh (Alternate I) 
Dr B. J. C. Basu (Alternate II) 

Shri Arun Anand 

Shri Yog Raj Kapur (Alternate) 

ShriM.S. Tripathi 

Shri R. C Gupta (Alternate) 

DrR.C.Sood 

Shri R. Rangarajan 

Shri B. A. Rakhangi (Alternate) 

Shri U. K. Nat>i 

Shrimati A. D. Sathe (Alternate) 

Shri R, K. Aggarwal 

Shri K. B. Easwaran (Alternate) 

Shri R. P. Kalyanpur 

Shri Siddhartha Roy 

Shri A. S. Dalve (Alternate) 

Shri C. Bhaskar 

Shri Manmohan Krishan (Alternate) 

Shri Anjan Kar, Director & Head (PCD) 

[Representing Director General (Ex-officio)] 



Member-Secretary 

Shri T. Kalaivanan 

Joint Director (PCD), BIS 

Thermoplastics Subcommittee, PCD 12:3 



Organization 
Reliance Industries Ltd, Mumbai 
All India Plastic Indiistries Association, Delhi 
Bhor Industries Ltd, Mumbai 

Caprihans (India) Pvt Ltd, Mumbai 

Central Institute of Plastics Engineering & Technology, Chennai 

Colour-Chem Limited, Mumbai 
GE Plastics India Ltd, Dist Vadodara 

Gujarat State Fertilizers Co Ltd, Vadodara 

Haldia Petrochemicals Ltd, Kolkata 



Representativefs) 

Dr Y. B. Vasudeo (Convener) 

Shri D. Jain 

ShriV.V.Amdekar 

Dr V. S. JosHi (Alternate I) 
Shri S. V. Charva (Alternate II) 

Shri M.K.Datta Ray 

Dr S. V. Peddada (Alternate) 

DrR.Janardhan 

Shri S. K. Chattapodhyay (Alternate) 

Shri S. S. Kulkarni 

Shri P. V, Muru Mohan 

Dr Gopal Majumdar (Alternate) 

Shri B. D. Adhvaryu 

Dr Y. P. Singh (Alternate) 

Shri Amttava Sanyal 

Shri Raj Datta (Alternate I) 
Shri R. L. Wadhwa (Alternate II) 

(Continued on page 14) 



13 



IS 10951 : 2002 

{Continued from page 13) 
Organization 

Hindustan Fluoro Carbon Ltd, Hyderabad 
Indian Petrochemicals Corporation Ltd, Vadodara 

Ministry of Defence (DGI), Kanpur 

Ministry of Defence (R & D), Kanpur 

National Organic Cliemicals Industries Ltd, Mumbai 

Sriram Fertilizers & Chemicals, Kota 

Supreme Petrocheni Ltd, Mumbai 

The All India Plastics Manufacturers' Association, Mumbai 

The Hindustan Polymers Ltd, Mumbai 

Unnati Industries, Ahmedabad 

XPRO India Ltd, Faridabad 



Representative(s) 

Or PS. Das 

ShriJ.B, Kamat 

Shri V. C. Francis {Alternate) 

Dr S.P.Singh 

Shri Gdush Trtvedi {Alternate) 

Dr L. D. Kandpal 

Dr R. K. Singh {Alternate) 

Shri J. K. Vadodaria 

Shri V. K. Sharma {Alternate) 

Shri M. S. Tripathi 

Shri R. C. Gupta {Alternate) 

Shri R. Rangarajan 

Shri A. K. Mukherjee 

Shri Umakant A. Shah {Alternate) 

Shri S.S. An AND 

Shri A. K.. Mukherjee {Alternate) 

Shri M. C. Pauwal 

Shri Janak G. Nanavaty {Alternate) 

Shri C. Bhaskar 

Shri Ravi Kumar {Alternate) 



14 



Bureau of Indian Standards 

BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promote 
harmonious development of the activities of standardization, marking and quality certification of goods 
and attending to connected matters in the country. 

Copyright 

BIS has the copyright of all its publications. No part of these publications may be reproduced in any form 
without the prior permission in writing of BIS. This does not preclude the free use, in the course of 
implementing the standard, of necessary details, such as symbols and sizes, type or grade designations. 
Enquiries relating tg copyright be addressed to the Director (Publications), BIS. 

Review of Indian Standards 

Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed 
periodically; a standard along with amendments is reaffirmed when such review indicates that no changes are 
needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards 
should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of 
'BIS Catalogue' and 'Standards: Monthly Additions'. 

This Indian Standard has been developed from Doc : No. PCD 12 (1755). 



Amendments Issued Since Publication 



Amend No. 



Date of Issue 



Text Affected 



BUREAU OF INDIAN STANDARDS 
Headquarters : 

Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110 002 
Telephones : 323 01 31, 323 33 75, 323 94 02 

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